Yes. The itinerary code is the communication big data itinerary card. One code is also equivalent to the health code. It is the data received by the China Academy of Information and Communications Technology in conjunction with China Telecom, China Mobile and China Unicom, the three basic telecommunications companies, using mobile phones. The itinerary code will be updated when seeking medical treatment in other provinces. If The itinerary code will change or even turn red when passing through medium and high-risk areas.